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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (Unaudited)
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
Selected quarterly financial data (unaudited) for the year ended December 31, 2018 and 2017 is presented below:
 
Quarter Ended (Unaudited)

March 31,

June 30,

September 30,

December 31,
2018







Total revenues*
$
30,495


$
24,168


$
25,268


$
29,402

Loss from Operations
$
(25,264
)

$
(34,311
)

$
(29,024
)

$
(42,578
)
Net (loss) income
$
(15,816
)

$
13,744


$
(68,718
)

$
(49,221
)
Net loss per share, basic and diluted
$
(0.16
)

$
0.13


$
(0.66
)

$
(0.47
)

* See Note 2(i) for a discussion of our adoption of Topic 606 effective beginning on January 1, 2018.

Quarter Ended (Unaudited)

March 31,

June 30,

September 30,

December 31,
2017







Total revenues
$
29,101


$
34,301


$
36,395


$
28,570

Loss from Operations
$
(21,909
)

$
(18,609
)

$
(15,054
)

$
(41,088
)
Net loss
$
(23,547
)

$
(20,852
)

$
(18,293
)

$
(28,556
)
Net loss per share, basic and diluted
$
(0.30
)

$
(0.27
)

$
(0.22
)

$
(0.29
)

Net loss per basic and diluted shares are computed independently for each of the quarters presented based on basic and diluted shares outstanding per quarter and, therefore, may not sum to the totals for the year.